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White wine makes a good accompaniment to fish dishes because it has low levels of iron, report Japanese scientists.

Takayuki Tamura and colleagues from Mercian Corporation set out to investigate the rule of thumb that says white wine goes with fish, red with meat. Red wines are reported to yield a fishy aftertaste when eaten with fish.

The team asked wine tasters to try a raft of red and white wines with scallops. They found the fishy aftertaste was more pronounced in red wines with higher iron levels.

Since iron levels vary on origin, wine variety and vintage, they suggest that some low-iron reds may make for a good fish accompaniment after all.